What is a condensing boiler?

45 Answers

Answered by Saffron Heating

22nd April 2019

Saffron Heating answered the question "What is a condensing boiler?"

In order to understand what a condensing boiler does, you need to first take a look at non-traditional boilers. Standard boilers burn gas or oil to heat up water. This reaction leaves water vapour and CO2 as by-products. In non-condensing boilers, these excess gases are normally released through the flue pipe. These gases have heat energy that is lost to the atmosphere, meaning you get less heat! In contrast, condenser boilers pass the waste gases to either a larger or additional heat exchanger, extracting even more heat. The excess gases cool and condense into a liquid called condensate (hence the name of condenser boiler!). Since April 1, 2005, all new boilers installed in the UK must be a condensing boiler. Building regulations state that condensing boilers are mandatory, whether you are installing a boiler into your existing system or constructing a newly-built property.

Answered by HPE Services

19th April 2019

HPE Services answered the question "What is a condensing boiler?"

A condensing boiler is a boiler that is designed to increase its efficiency by recovering the latent heat in the flue gases produced during the combustion process. The latent heat is used to preheat the water in the central heating system thereby lowering the overall energy required to heat the system. Condensing boilers have very high efficiency levels typically in the 90% range.

Answered by Parallel plumbing and heating

17th April 2019

Parallel plumbing and heating answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by Tom Sutton Heating

16th April 2019

Tom Sutton Heating answered the question "What is a condensing boiler?"

A condensing boiler recovers the the latent heat lost from the combustion process by condensing water vapour in the flue system and re using to pre heat the water that runs through the heat exchanger. Typically a high efficiency condensing boiler can increase efficiency levels by 10-12% compared to a standard efficiency boiler.

Answered by T Brown Heating Solutions Ltd

15th April 2019

T Brown Heating Solutions Ltd answered the question "What is a condensing boiler?"

A Condensing Boiler is a high efficiency appliance where the flue gas temperatures are used to preheat the heating medium returning to boiler. As a result the temperature of the flue gases are reduced to typically less than 100 degrees and start condensating which is the plume you usually see from a flue on cooler days. This process recovers what once was wasted heat and now results in a much more efficient appliance saving you money.

Answered by Globe gas and plumbing

14th April 2019

Globe gas and plumbing answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by WaterTherm Heating Solutions Ltd

13th April 2019

WaterTherm Heating Solutions Ltd answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain. In many countries, the use of condensing boilers is compulsory or encouraged with financial incentives.

Answered by Martin Fox Plumbing and Heating Services

13th April 2019

Martin Fox Plumbing and Heating Services answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensingwater vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain. In many countries, the use of condensing boilers is compulsory or encouraged with financial incentives.

Answered by Rekan Kingji

12th April 2019

Rekan Kingji answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain

Answered by Northern heating and solar Ltd

12th April 2019

Northern heating and solar Ltd answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by Leo Vann Heating

12th April 2019

Leo Vann Heating answered the question "What is a condensing boiler?"

A condensing boiler is high efficiency boiler powered by lpg or natural gas. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering latent heat of vaporisation, which other wise would have been wasted. This condensed vapour leaves the system in liquid form via a drain. This need carefully consideration about routing, so as not to freeze in the colder months.

Answered by Eco BlueSka Services

12th April 2019

Eco BlueSka Services answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas . They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by BJC Plumbing & Heating

11th April 2019

BJC Plumbing & Heating answered the question "What is a condensing boiler?"

a condensing boiler is a modern boiler which has a seperate heat exchanger which absorbs the energy from the flue gases which would otherwise be wasted, making it a more efficient boiler. the condensation is collected in a trap and exits via a waste pipe connected to a waste or drain

Answered by i-Fix Gas & Heating

8th April 2019

i-Fix Gas & Heating answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain called a condensate pipe. All new boilers must meet a minimum efficiency.

Answered by BPM

3rd April 2019

BPM answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by Enflame Heating and Plumbing

1st April 2019

Enflame Heating and Plumbing answered the question "What is a condensing boiler?"

As with traditional heating systems, a condensing boiler burns natural gas to heat the water throughout your home, producing a combination of carbon dioxide and water vapour. Unlike traditional systems, it features a larger heat exchanger, or in some cases a secondary heat exchanger, which recycles the waste gases back into the heating system. By doing this, the system maintains an energy efficiency of around 90%, far higher than the 70-80% produced by non-condensing boilers. From the off, the advantages of a condensing boiler are evident, offering cost-effective, 24-hour heating for your entire home.

Answered by S & L Plumbers

29th March 2019

S & L Plumbers answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by 3T Gas maintenance Ltd

29th March 2019

3T Gas maintenance Ltd answered the question "What is a condensing boiler?"

A condensing boiler is the most modern boiler with a more efficient heat exchanger which allows you to recirculate flue gases and extract the heat and energy from them , which would otherwise be lost , condensing boiler also produce lots of water vapour which will be discharged via a waste pipe to a drain

Answered by James whitehead plumbing and heating

26th March 2019

James whitehead plumbing and heating answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Answered by GJC Plumbing & Heating Ltd

25th March 2019

GJC Plumbing & Heating Ltd answered the question "What is a condensing boiler?"

A high-efficiency condensing boiler is a good choice if you're looking for a greener and more efficient boiler. This is because condensing boilers are able to make better use of the heat they generate from burning fuels, such as gas or oil. A condensing boiler requires less heat from the burner, so is more efficient. How does a condensing boiler work? With a non-condensing heat-only boiler, some heat is wasted in the form of hot gases released from the flue. A condensing boiler captures some of the heat from these gases and uses it to heat water returning from your central heating system. It therefore requires less heat from the burner and is more efficient.

Answered by R JJ Fairfax Heating and Plumbing

25th March 2019

R JJ Fairfax Heating and Plumbing answered the question "What is a condensing boiler?"

Condensing Boilers are A rated and are more efficient than the standard conventional domestic boiler They are more efficient because they recover some of the heat that would usually be lost from the waste gases they give off. The waste gases travel through a heat exchanger, which cools and condenses them back into a liquid known as condensate.

Answered by Walkwood plumbing & heating ltd

23rd March 2019

Walkwood plumbing & heating ltd answered the question "What is a condensing boiler?"

There are around eight million Condensing Boilers installed in Britain’s homes. In theory this type of boiler will operate at around 93% efficiency compared to the 75% efficiency of older type of boilers. This reduces both the carbon CO2 emissions and reduces the average annual fuel bill on average by about £200. From 1st April 2005, John Prescott made it mandatory that all new and replacement gas fired boilers fitted in British homes (around 1.4 million a year) must be of the condensing type. In 2008 the boiler scrappage scheme was introduced offering a grant of £400 towards the cost of a new condensing boiler. Every year around 1.2 million older boilers are replaced with the newer “fuel efficient” condensing boilers.

Answered by Castle Heating Kent

23rd March 2019

Castle Heating Kent answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted This condensed vapour leaves the system in liquid form, via a drain, waste pipe.

Answered by Eco home energy ltd

19th March 2019

Eco home energy ltd answered the question "What is a condensing boiler?"

Condensing boilers made or fitted after 2004 had to be made and fitted to strict energy efficiency laws. Over 90% energy efficient as exhaust gasses create vapour which is then ran into the drain via the condense trap. These boilers can save money on your energy bills as they will use less gas than non condensing boilers.

Answered by T G Property Services

16th March 2019

T G Property Services answered the question "What is a condensing boiler?"

A condensing boiler recovers heat by condensing the vapour from the exhaust gases/fumes and uses the heat of the condensate to gain a considerable extra amount of heat that would otherwise be lost to the atmosphere. The condensate is drained from the boiler to a drain or a specific soak-away. In addition to this further heat gain the condensate created holds a great deal of the nasties that would otherwise be pumped into the local atmosphere.

Answered by Precision Plumbing & Heating

1st March 2019

Precision Plumbing & Heating answered the question "What is a condensing boiler?"

The purpose of a condensing boiler is to generate more heat from waste gases which would be lost with a non-condensing boiler. These waste gases are produced as the boiler operates and then emitted out into the atmosphere, so the heat they carry is normally lost. However, a condensing boiler has 2 internal heat exchangers which capture and reuse this heat so they can reach high efficiencies of over 90%. Condensing boilers are around 15-30% more energy efficient than non-condensing boilers

Answered by Dace Gas Services

28th February 2019

Dace Gas Services answered the question "What is a condensing boiler?"

A condensing boiler uses modern technology to maximise the efficient use of the fuel (usually gas or oil) - typically a condensing boiler will be up to 90% efficient, whereas old boilers can be as low as 70%. The design of the boiler extracts more heat from the burner by using a highly efficient heat-exchanger and by feeding the cooler water returned from the radiators through a secondary heat exchanger in the hot flue gases so that the water is warmed before entering the boiler. Condensing boiler are known as such the temperature of the flue gases is lower and the moisture in it 'condenses', this water drains away through the bottom of the boiler –this 'drain' is normally through a pipe to the outside of the building, this pipe is one significant difference to an 'old' boiler installation.

Answered by T.Franks Gas & Plumbing

28th February 2019

T.Franks Gas & Plumbing answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain

Answered by S3 Heating and Plumbing

28th February 2019

S3 Heating and Plumbing answered the question "What is a condensing boiler?"

Condensing boilers have a higher efficiency compared to non condensing. The law was changed in 2005 that all new installations must be a condensing boiler. A condensing boiler works by condensing water vapour in the exhaust gases and so recovers its latent heat of vaporisation which would have just been wasted by going out of the flue. The condensed vapour leaves the system in a liquid form via a drainage pipe. This is why condensing boilers have that white pipe coming out of it compared to a non-condensing boiler, and this pipe usually goes to a drain inside or outside of the house.

Answered by Beales Services

27th February 2019

Beales Services answered the question "What is a condensing boiler?"

Condensing boilers are water heating appliances run on either gas or oil, designed with the aim of efficiently converting water vapour condensation into heat for your home. Condensing boilers have all the same elements as non-condensing boilers but the difference is they have a larger heat exchanger so can produce more heat from the fuel they burn. Since 1st April 2005 it has been a legal requirement under building regulations that all gas boilers installed in England and Wales must be condensing boilers. There are two main benefits to gain from installing a condensing boiler: lower energy bills and a reduced carbon footprint.

Answered by County Gas Services

25th February 2019

County Gas Services answered the question "What is a condensing boiler?"

Boiler that is efficient when being used over older non condensing boilers They work but lowering the flue temperatures and keeping the heat usable for the user Condensation is produced when the flue temperature is lowered and this is where the boiler gets its name from condensing boiler

Answered by PMA Gas Solutions

15th February 2019

PMA Gas Solutions answered the question "What is a condensing boiler?"

A condensing boiler is a boiler that reclaims wasted heat that would normally be expelled through the flue. Some have secondary heat exchangers to do this or has a secondary heat exchanger built into the primary heat exchanger. As the water in the flue gasses cools down, it drops onto the heat exchanger and flashes to steam causing extra heat to go into the heating/hot water system. The waste water then drains away from the boiler through the condensate pipe.

Answered by Home Heating UK

12th February 2019

Home Heating UK answered the question "What is a condensing boiler?"

All boilers made and fitted after 2004 had to be more energy efficient So all boilers where made to condense, by doing this boiler could achieve over 90% effiencey level A good boiler will save you money on your heating bills as you will need less gas to get the same heat output as a older non condensing boiler

Answered by Ace Gas Redditch

11th February 2019

Ace Gas Redditch answered the question "What is a condensing boiler?"

Condensing boilers heat water by burning gas, lpg, oil or other forms of fuel . They achieve high efficiency usually above 90% by condensing water vapour in the exhaust gases and so recovering its latent heat, which would otherwise have been wasted. This condensed vapour is then discharged via the condense trap to a nearby drain.

Answered by Hanbury Plumbing and Heating Ltd

10th February 2019

Hanbury Plumbing and Heating Ltd answered the question "What is a condensing boiler?"

An A rated boiler which simple uses the product of combustion (stuff that comes out of the flue) to preheat the return pipe before it goes through the heat exchanger. This cools the POC down to due point causing water to form in the boiler, this runs out through the condensing pipe, this pipe is often ran outside and in the winter can freeze. All new boilers have to now be condensing boilers.

Answered by Ambient design and heating

10th February 2019

Ambient design and heating answered the question "What is a condensing boiler?"

A condescending boiler is describing that the boiler uses the heat from the flue gasses produced when burning gas by directing the hot flue gasses past the cold water used for the hot taps to use the lost heat energy to heat the water making it more efficient which in turn saves the user on their gas bills

Answered by Lakins Heating and Plumbing

10th February 2019

Lakins Heating and Plumbing answered the question "What is a condensing boiler?"

Condensing boilers heat water and are fuelled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases, with a none condensing boiler this would have been wasted and released to air, a condensing boiler makes use of this waste. The condensed vapour leaves the system in liquid form, via a drain

Answered by Boilers 4 Britain ltd

9th February 2019

Boilers 4 Britain ltd answered the question "What is a condensing boiler?"

Condensing boilers have two internal heat exchangers which means that the heat from flue gases lost to the atmosphere is decreased by recycling the heat back into the heating system. The water vapor in the flue gases can be so cool that it condenses and is removed to a waste pipe through a condensate pipe.

Answered by Plum-UK Ltd

9th February 2019

Plum-UK Ltd answered the question "What is a condensing boiler?"

With a non-condensing heat-only boiler, some heat is wasted in the form of hot gases released from the flue. A condensing boiler captures some of the heat from these gases and uses it to heat water returning from your central heating system. It therefore requires less heat from the burner and is more efficient. Read more: https://www.which.co.uk/reviews/boilers/article/buying-a-new-boiler/what-is-a-condensing-boiler - Which?

Answered by Smart Gas Plumbing & Heating Ltd

9th February 2019

Smart Gas Plumbing & Heating Ltd answered the question "What is a condensing boiler?"

To try and simplify it a condensing boiler uses water vapour (steam) that is produced by the burning process, It uses the heat in the waste gases that is usually lost through the flue and re-uses the heat in the water vapour and transforms it to liquid form which is then discharged into the drain via the condensate pipe by doing this process it can give added efficiency typically 10%-12%.

Answered by Ph plumbing & heating services ltd

9th February 2019

Ph plumbing & heating services ltd answered the question "What is a condensing boiler?"

A condensing boiler is a boiler that burns the gas in a more controlled way allowing more off the heat produced to end up in the heating or hot water system . Condensing boilers normally produce a 90% efficacy or a rated performance . Older types of boiler can be as low as 65% . This is a massive difference in the cost of heating your home

Answered by iGas Heating Ltd

9th February 2019

iGas Heating Ltd answered the question "What is a condensing boiler?"

A condensing Boiler is a boiler that utilities previously wasted heat from Boiler Flue Gases created in the Boiler Combustion process . Converting your Boiler from a conventional non-condensing Boiler to a condensing model will reduce your energy wastage and carbon footprint and subsequently reduce your energy bills saving you money every year

Answered by Cliff Plumbing & Heating Limited

9th February 2019

Cliff Plumbing & Heating Limited answered the question "What is a condensing boiler?"

A condensing boiler is a high efficiency boiler that re-uses previous lost heat in the flue. This causes condensation in the flue that runs back through the boiler, out from a white pipe underneath boiler into a drain. This causes plume from the flue which is very normal, especially in cold weather conditions. They reduce energy bills and carbon footprint.

Answered by Vital Plumbers Ltd

8th February 2019

Vital Plumbers Ltd answered the question "What is a condensing boiler?"

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain

Answered by Fawkes Heating

8th February 2019

Fawkes Heating answered the question "What is a condensing boiler?"

A modern energy efficient boiler. It is called a condensing boiler because it produces condensation as a byproduct of the combustion process. It is more efficient and condenses because it extracts more heat from burning the gas, than an older non-condensing boiler. You can tell if your boiler is condensing by having a quick look under it, if you have a white plastic pipe or corrugated plastic pipe then it's condensing.

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